Abstract
'Cardinal', 'Queen' and 'Emperor' grapes were used in export chests to determine the relation of sawdust moisture content, distribution of NaHSO3 in sawdust, distribution of dibromotetrachloroethane (DBTCE) in sawdust, and DBTCE-impregnated pads to the spread of Botrytis decay and incidence of bleaching injury of the fruit. Moisture content was directly related to decay and bleaching. Mixing of either fungistat with sawdust just prior to application to the fruit reduced overall decay and bleaching compared to top-application to the sawdust-filled chest. Vibration was not effective in distributing top-applied NaHSO3 to the bottom of the pack, but did have some effect in distributing DBTCE. Top and bottom pads impregnated with DBTCE controlled decay to some extent in sawdust-packed grapes, but were significantly poorer than either NaHSO3 or DBTCE powder mixed with the sawdust. DBTCE was superior to NaHSO3 as a fungistat with respect to longevity of effectiveness and non-injury to the fruit, its pungency and lachrymatory effect made it disagreeable to handle. It was emphasized that DBTCE could not be recommended for use since the chemical has not been cleared by the Federal Food and Drug Administration for use on grapes.
- Copyright 1966 by the American Society for Enology and Viticulture
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